VERITAS Volume Manager 3.5 Migration Guide (August 2002)

Comparison of LVM and VxVM Tasks Final 24 July 2002
54 VERITAS Volume Manager Migration Guide
LVM Increase the number of mirror copies. lvextend -m 2 /dev/vol_grp/lvol_name
VxVM Add mirrors to a volume or increase
the number of plexes.
vxassist mirror vol_name
LVM Convertamirroredlogicalvolumeinto
two logical volumes.
Split a logical volume.
lvsplit -s backup
/dev/vol_grp/lvol_name
VxVM Snapshot a volume and create a new
volume.
vxassist snapshot vol_name
new_vol_name
LVM Combine two logical volumes back
into a mirrored logical volume
lvmerge /dev/vol_grp/split_vol_name\
/dev/vol_grp/lvol_name
split_vol_name= active logical volume
VxVM Returns the snapshot plex to the
original volume from which it was
snapped.
vxassist snapback new_vol_name
LVM Move a mirrored logical volume from
one disk to another.
pvmove -n /dev/vol_grp/lvol_name\
/dev/dsk/disk_name
/dev/dsk/disk_name2
VxVM Move a plex. vxplex mv orig_plex new_plex
LVM Synchronize a mirrored logical
volume.
Synchronize extents within a mirrored
logical volume.
lvsync /dev/vol_grp/lvol_name
VxVM Resynchronize operations for the
given volumes.
vxvol resync
LVM Synchronize extents within mirrored
logical volumes in a volume group.
vgsync /dev/vol_grp
Table 3. LVM and VxVM Task Comparison
Task
Type
Description Example
Example for a disk_group = veritasdg, medianame = disk01, vol_name -= veritasvol, plex name =
veritasvol-01, subdisk -= disk01-01, devicename = c0t0d0.